<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <h2 v-for="lesson in lessons">{{lesson.title}}</h2>
    </div>
    <script src="https://cdn.bootcdn.net/ajax/libs/vue/3.2.26/vue.global.min.js"></script>
    <script>
        window.lessons = [{"title":"js"},{"title":"vue"}];
    </script>
    <script>
        Vue.createApp({
            data(){
                return{
                    lessons: window.lessons
                }
            }
        }).mount('#app');
    </script>
</body>
</html>